<!doctype html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <title>首页</title>
    <style>
        .panel{display:flex;
            justify-content: center;
            align-content: center;
            height:20em;
            margin-bottom:20px;background-color:#fff;border:1px solid transparent;border-radius:4px;-webkit-box-shadow:0 1px 1px rgba(0,0,0,.05);box-shadow:0 1px 1px rgba(0,0,0,.05)}
        .text-center{text-align:center}
    </style>
</head>

<body class="bg-light">
    <div class="panel">
        <div class="text-center">
          <h2><stong>404错误！很抱歉，您要找的页面不存在</stong></h2>
            <div class="padding-big"> <a href="/" class="btn btn-primary" draggable="false">返回首页</a>
            </div>
           
        </div>
    </div>
</body>

</html>